error-by-2463321.log

LogicException: Settings can not be serialized. This probably means you are serializing an object that has an indirect reference to the Settings object. Adjust your code so that is not necessary. in Drupal\Core\Site\Settings->__sleep() (line 67 of core/lib/Drupal/Core/Site/Settings.php).
serialize(Array)
Drupal\Component\Serialization\PhpSerialize::encode(Array)
Drupal\Core\KeyValueStore\DatabaseStorageExpirable->setWithExpire('form-pRbhHqrMfS0Ze2xmZj6YbazW8LgYH8vIFsV8ZBOwTow', Array, 21600)
Drupal\Core\Form\FormCache->setCache('form-pRbhHqrMfS0Ze2xmZj6YbazW8LgYH8vIFsV8ZBOwTow', Array, Object)
Drupal\Core\Form\FormBuilder->setCache('form-pRbhHqrMfS0Ze2xmZj6YbazW8LgYH8vIFsV8ZBOwTow', Array, Object)
Drupal\Core\Form\FormBuilder->processForm('error_style_form', Array, Object)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1)
Drupal\Core\DependencyInjection\Container\prod\Symfony_Component_HttpKernel_HttpKernel_Proxy->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1)
Drupal\Core\DependencyInjection\Container\prod\Drupal_Core_StackMiddleware_Session_Proxy->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1)
Drupal\Core\DependencyInjection\Container\prod\Drupal_Core_StackMiddleware_KernelPreHandle_Proxy->handle(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1)
Stack\StackedHttpKernel->handle(Object, 1, 1)
Drupal\Core\DrupalKernel->handle(Object)